Safety appliance for elevators.



No. 070,004. PATBNTED N07. 5, 1007.

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SAFETY APPLIANCE FOR ELEVATORS. APPLIoATIoN FILED M1029. 1007.

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J, COLEMAN. SAFETY APPLIANGB FOR BLEVATURS.

APPLIGAT'IQN FILED JAN: 29. 1907.

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JESSE COLEMAN, OF SHELBURN, INDIANA.

SAFETY APPLIANCE FOR ELEVATORS.

Specification of Letters Patent.

Patented Nov. 5, 1907.

Applicationiflled January 29. 19071 Serial No. 354,642.

To all whom it may concern:

Be it known that I, .IEssn COLEMAN, a citizen of the United States,residing at Shelburn, in the county oi Sullivan, State of Indiana, haveinvented certain new and useful Improvements in Safety Appliances forElevators; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention has relation to elevators or lifts generally, andparticularly to such as are employed in the shafts of mines and forfreight-hoisting purposes.

It is the special purpose of the invention to provide an improvement inthe stop or locking means to prevent the cage or carrier from falling ordescending in Case the hoisting cable should break or otherwise fail.

The nature of the invention is to be ascertained from the meansillustrated in the annexed drawings, forming a part oi thisspecification, in view of which it will rst be described with respect toits construction and mode of operation and then be pointed out in thesubjoined claims.

Of the said drawings- Figure lis a vertical sectional view of theelevator or lift embodying my improvements showing the safety hooks asheld out of engagement with the horizontal bars at the sides of theelevator shaft. Fig. 2 is a horizontal sectional view taken in the plane2 2, Fig. l. Fig. 3 is a view similar to Fig. l, but showing the safetyhooks as released and in engagement with the horizontal bars of theelevator shaft.' Fig. 4 is a detached view of one of the safety hooks.

Similar numerals of reference designate similar parts or features, asthe cas'e may be, wherever they occur.

In the drawings, A designates the elevator cage or carrier provided withbeams or cross-plates ll at its top; and l2 designates guide-bars atopposite sides of the elevator shaft or well, the sides of whichguide-bars are engaged on opposite sides by the inwardly extendedportion 13 of angle irons, secured to the outer sides of theelevator toguide and steady its vertical Inovements. Extending laterally of thesides oi the cage or carrier are spaced bars 14 which practically formthe sides of the elevator shaft.

l5 designates the hoisting cable or rope fastened at one end to thewindlass operated by the engine, and at the other end to the rod or barI6 extending between the plates ll, through the medium of strong springs17 and 1S which prevent sudden jar or jerk upon the starting of the car.

19 designates the safety-hooks the shanks of which are centrally pivotedon the outside of each plate ll near its ends. The upper arms of thehooks are connected with the ends of chains 20, which latter arecentrally connected with the hoisting cable l5 at a point where thelatter is connected to the springs 17, said chains'serving to normallyhold the hooks 19 out of engagement with the bars 14 of the elevatorshaft. The lower projecting ends or arms of the hooks I9 are providedwith eyes in which the ends of helical springs 2l are connected so as tooperate with a tendency to draw the lower ends or arms of the hookstoward cach other. The hooks at their upper ends are adapted whenreleased to engage the side bars 14 of thel elevator shaft so as to holdthe cage against downward movement.

rlhe means just described are provided for the purpose of preventing thefall of the cage in case the hoisting rope or cable should break orotherwise fail in which case the chains 20 will be relaxed permittingthe spring 2l to draw inward on the lower arms of the hooks and allowthe latter to fly outward and engage the side bars 14 of the elevatorshaft.

22 designates the floor of the cage supported on cross bars 23 at theends of which are braces 24 to maintain it in position.

25 are angle-irons below the cross bars 23 to stifen and keep the cagein position so as not to bind on the guide bar.

It is understood that there are four hooks 19 employed, one on the outerside of each end portion of each plate or beam ll and that there arechains 2() connected with the hooks and with the lifting rope ashereinbefore described. In the case of breakage orfailure ofthe hoistingcable l5 the springs 17 and I8 will assist instantly in pulling downsaid relaxed cable so as to quickly relax tension on the chains 2O andallow the released hooks I9 to engage the bars 14.

Instead of applying the means described to a vertically operating cage,it may be employed on a car running on an incline into a mine forraising coal or ore, or for carrying the men from the bottom of themines to the mouth of the shaft or drift.

The means described are quite simple in construction but at the sametime most eicient in use and operation.

What is claimed is:

An elevator cage comprising overhead bars, hooks having Shanks centrallypivoted on the ends of the bars and adapted to be operated to engagemeans on the sides of the elevator-shaft to hold the elevator-cageagainst dropupon the failure of the hoisting cable and the slacking of10 ping, a hoisting cable, chains connected at their outer ends the saidchains.

with the upper arms of the Shanks of the hooks and cen- In testimonywhereof, I alix my signature, in presence trally connected with thelower end o'f the cable to hold of two witnesses.

the hooks normally out of engagement with the said means on the sides ofthe elevator shaft, springs connecting the JESSE COLEMAN' lower` end ofthe cable with said bars, and springs en- Witnesses: gaged at their endswith the lower arms of the hooks, and F. J. HARTIN,

operating' with a tendency to throw said hooks into action R. B.COLEMAN.

